I am looking for an IC that will take 12 volts DC input and generate +/- 5 volts DC out at a few milli-amps?
To drive a couple of LCD panel meters.
JERD
I am looking for an IC that will take 12 volts DC input and generate +/- 5 volts DC out at a few milli-amps?
To drive a couple of LCD panel meters.
JERD
"JERD"
** Not and IC, but a mini inverter module like this will do it :Nice price ($ 12.45 + ) but no stock at present.
Same goes for two other similar ones.
........ Phil
"Geoff C"
** Neither item is no longer stocked by Farnell.Alternatives offered are out of stock except for this one at $25.77 +
....... Phil
"JERD" wrote in news:bea7h.67422$ snipped-for-privacy@news-server.bigpond.net.au:
Farnell 868-9792, 3kV isolation, 10 to 100mA.SMD. $14.46
or
868-9873 1kV isolation at $10.75.just add caps.
There wont be an IC as such, unless you look at some of the Maxim switched capacitor converters.
Watch out for these, some I have used (from Farnell) do not regulate at very low loads like a few mA.
These are probably better for small loads like an LCD panel.
Dave :)
Try a MAX232 serial interface driver. It doesn't meet your specs exactly. It will do the following:
Cheers Glenn
Could you approach it slightly differently by using 0/5v/10v and set the common to be 5v? I suppose it depends what the rest of your circuit is running at, but assuming all you other logic uses +5V then you could use a
7810 on the 12v supply to give your +5v rail, the output from a 7805 to give you your 0v rail, then when you want -5v you just use the ground from the original +12v supply.Cheers, Gadget
Hi JERD,
I bought some 12v to 9v DC-DC converter modules from (not to be confused with Altronics)
Also, these modules appear similar to the one I bought, but you may have to do a bit of searching to find out who sells them.
JERD wrote:
The old ICL7660 can do something like that, though you would need to reduce the input voltage by putting a regulator before the 7660.
There are probably plenty of newer parts but perhaps the old 7660 is easier to find.
Chris
A few milliamps? Why not just use a two 7805s have ones ground beind the others outputs and you will end up with +5 and +10.
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